Hi
UtterlyExhausted,
Welcome! Good name choice, BTW.
I'm glad you're here and that you posted. Definitely sounds like so many hardships are going on, and trying to stay the course is troublesome. I can tell that you are supportive of your uBPDw and are trying your best to hang in there.
Is it possible or probable that her DBT sessions are triggering her emotions so much that she is self soothing by taking it out on you? I know it's a strange way to soothe oneself by hurting those you love. My uBPDm did this all the time. It hurt my dad and my siblings, and I so much. I'm so sorry you are going through this.
As to your last question about walking away, since I don't have a good answer for that, I will let some of the more experienced team members here offer their thoughts. I do know that staying could cause you to escalate, and that wouldn't be good. We need to help you find some good options for a plan B that will keep you and your kids safe. Safety is priority #1.
Wools